Add FieldUtils getAllFields() to return all the fields defined in the given class and super classes

java.lang.Class.getDeclaredFields() doesn't return the fields defined by the super classes. I'd like to suggest the addition of a new method in FieldUtils that also returns the inherited fields (including the private fields).

According to this question on StackOverflow this method would be quite useful:

http://stackoverflow.com/questions/3567372/access-to-private-inherited-fields-via-reflection-in-java